--- a/configure.in
+++ b/configure.in
@@ -232,16 +232,17 @@ dnl Don't rely on virtualenv here. Stand
     from ConfigStatus import config_status
     config_status(**args)
 EOF
 changequote([,])dnl
 
 # Make the config.status file executable
 chmod +x $CONFIG_STATUS
 
+_SUBDIR_CONFIG_ARGS="$ac_configure_args"
 if test -n "$UNIFY_DIST"; then
     # Make --with-unify-dist point to the right path
     _SUBDIR_CONFIG_ARGS="$_SUBDIR_CONFIG_ARGS --with-unify-dist=$UNIFY_DIST"
 fi
 
 # build Mozilla first
 #
 # the subdir may not yet have been created in the build tree.